Philadelphia, Pa.
H
I S T O R I C A L
W
E A T H E R
D
A T A
Average Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
54.3
30.4
33
42.4
52.4
62.9
71.8
76.7
75.5
68.2
56.4
46.4
35.8
°C
12
0
0
5
11
17
22
24
24
20
13
8
2
Years Charted: 30
Source:
National Weather Service, San Francisco
Results based on data collected from 1961 - 1990
Average High Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
63.4
37.9
41
51.6
62.6
73.1
81.7
86.1
84.6
77.6
66.3
55.1
43.4
°C
17
3
5
10
17
22
27
30
29
25
19
12
6
Years Charted: 30
Source:
National Weather Service, San Francisco
Results based on data collected from 1961 - 1990
Average Low Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
45.1
22.8
24.8
33.2
42.1
52.7
61.8
67.2
66.3
58.7
46.4
37.6
28.1
°C
7
-5
-4
0
5
11
16
19
19
14
8
3
-2
Years Charted: 30
Source:
National Weather Service, San Francisco
Results based on data collected from 1961 - 1990
Highest Recorded Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
104
74
74
87
94
97
100
104
101
100
96
81
72
°C
40
23
23
30
34
36
37
40
38
37
35
27
22
Years Charted: 52
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Lowest Recorded Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
-7
-7
-4
7
19
28
44
51
44
35
25
15
1
°C
-21
-21
-20
-13
-7
-2
6
10
6
1
-3
-9
-17
Years Charted: 52
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Mean Number of Days Below 32°F/0°C
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
95
26
22
14
2
---
0
0
0
0
1
8
21
Years Charted: 34
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Average Precipitation
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
in.
41.41
3.21
2.79
3.46
3.62
3.75
3.74
4.28
3.8
3.42
2.62
3.34
3.38
mm
1051
81
70
87
91
95
94
108
96
86
66
84
85
Years Charted: 30
Source:
National Weather Service, San Francisco
Results based on data collected from 1961 - 1990
Average Snowfall
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
in.
20.8
6.4
6.4
3.7
0.3
0
0
0
0
0
0
0.6
3.4
mm
528
162
162
93
7
0
0
0
0
0
0
15
86
Years Charted: 51
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Average Wind Speed
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
mph
9.6
10.3
10.9
11.4
10.9
9.5
8.8
8.2
7.9
8.3
8.9
9.6
10.1
km/h
15
16
17
18
17
15
14
13
12
13
14
15
16
Years Charted: 53
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Average Days of Precipitation
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
117
11
9
11
11
11
10
9
9
8
8
9
10
Years Charted: 53
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Days With Sunshine
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
%
56
50
53
55
55
56
62
62
61
59
59
52
49
Years Charted: 51
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Mean Number of Cloudy Days
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
160
16
14
15
14
14
11
12
12
11
12
14
15
Years Charted: 53
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Mean Number of Partly Cloudy Days
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
112
8
7
8
9
11
12
12
11
9
9
9
8
Years Charted: 53
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Mean Number of Clear Days
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
93
7
7
8
7
6
7
7
8
10
10
7
8
Years Charted: 53
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Average Morning Relative Humidity
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
%
76
73
71
72
71
75
76
79
81
83
83
78
74
Years Charted: 34
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Average Afternoon Relative Humidity
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
%
55
59
55
52
49
52
53
54
55
56
54
56
59
Years Charted: 34
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
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